Sun Tao, Liu Aoxin, Ge Chao, Yuan Ying, Wang Haifu
Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, China.
Materials (Basel). 2022 Jul 26;15(15):5167. doi: 10.3390/ma15155167.
Quasi-static tension tests, quasi-static compression tests and dynamic compression tests were conducted to investigate the mechanical properties, constitutive behaviors and failure criteria of aluminum-polytetrafluoroethylene-tungsten (Al-PTFE-W) reactive materials with W content from 20% to 80%. The analysis of the quasi-static test results indicated that the strength of the materials may be independent of the stress state and W content. However, the compression plasticity of the materials is significantly superior to its tension plasticity. W content has no obvious influence on the compression plasticity, while tension plasticity is extremely sensitive to W content. Dynamic compression test results demonstrated the strain rate strengthening effect and the thermal softening effect of the materials, yet the dynamic compression strengths and the strain rate sensitivities of the materials with different W content show no obvious difference. Based on the experimental results and numerical iteration, the Johnson-Cook constitutive (, , , and ) and failure parameters (~) were well determined. The research results will be useful for the numerical studies, design and application of reactive materials.
进行了准静态拉伸试验、准静态压缩试验和动态压缩试验，以研究钨含量为20%至80%的铝-聚四氟乙烯-钨（Al-PTFE-W）反应材料的力学性能、本构行为和失效准则。对准静态试验结果的分析表明，材料的强度可能与应力状态和钨含量无关。然而，材料的压缩塑性明显优于其拉伸塑性。钨含量对压缩塑性没有明显影响，而拉伸塑性对钨含量极为敏感。动态压缩试验结果表明了材料的应变率强化效应和热软化效应，但不同钨含量材料的动态压缩强度和应变率敏感性没有明显差异。基于实验结果和数值迭代，很好地确定了Johnson-Cook本构（、、、和）和失效参数（~）。研究结果将有助于反应材料的数值研究、设计和应用。
